226 POLYGONACEAE 



inflorescence floccose; involucres sessile, 1.5-2 mm. long, glabrate; lobes oblong; 

 perianth rose-colored, campanulate, 1.5 mm. long. Dry mountains: N.M. 

 Utah Nev. Ariz. Son. My-S. 



95. E. nidularium Coville. Profusely branched annual; leaves basal, 

 slender-petioled; blades orbicular, often subcordate at the base or subreniform, 

 floccose on both sides; inflorescence 1-2 dm. high; involucres turbinate, 1-15 mm. 

 long, sessile; perianth yellowish, turbinate, about 2 mm. long. (?) E. nummulare 

 M.E.Jones. Sandy or stony hills: Ida. w Ariz. se Calif. Son. My-Au. 



96. E. Plumatella Dur. & Hilg. Divaricately branched annual; leaves 

 clustered near the base, tomentose, short-pet ioled, spatulate; inflorescence 2-4 

 dm. long, tomentose; bracts subulate: involucres obconic, glabrous, 2.5 mm. 

 long; lobes rounded, ciliolate; perianth white, about 2 mm. long, glabrous; seg- 

 ments oval. Desert regions: s Utah s Calif. L. Son. 



97. E. tenellum Torr. Scapose, cespitose perennial, with woody caudex; 

 leaves basal, petioled ; blades orbicular or ovate, densely and finely white-tomen- 

 tose on both sides, 0.5-1 cm. long; scapes 2-4 dm. high, glabrous; peduncles 

 slender, erect, glabrous, 1-2 cm. long; involucres turbinate, glabrous, 3 mm. 

 long; lobes triangular-ovate; perianth white, 2.5-3 mm. long; outer lobes broadly 

 obovate, the inner oblong or cuneate, both emarginate. Arid or rocky places: 

 Tex. Colo Utah N.M. ; n Mex. Son. Ap-N. 



98. E. Hookeri S. Wats. Scape 2-4 dm. high; leaf-blades orbicular, 2-6 

 cm. broad; involucres nearly 2 mm. long; lobes broadly ovate; perianth 1.5-2 

 mm. long; lobes oblong, much smaller than the outer. Canons and sandy places: 

 Nev. Wyo. Utah Ariz. Son. Au-S. 



99. E. deflexum Torr. Scape glabrous, 2-4 dm. high; blades orbicular, 

 subcordate at the base, 1-3 cm. broad; involucres campanulate, glabrous, 1.5 

 mm. long; lobes rounded-ovate; perianth white, 1.5-2 mm. long; inner lobes 

 much smaller than the outer, ovate or lance-ovate. Arid regions: Ariz. s 

 Utah Calif. L. Son. My-S. 



100. E. cernuum Nutt. Scape glabrous, 2-4 dm. high; leaf-blades or- 

 bicular or oval, 1-2 cm. broad; peduncles 0.5-2 cm. long; involucres glabrous, 

 campanulate, 1.5-2 mm. long; lobes ovate, obtuse; perianth white or pinkish, 

 about 2 mm. long; inner lobes elliptic-cuneate, narrower, but almost as long as 

 the outer. "Bad-lands," hills, and canons: Sask. Neb. N.M. Ariz. -Ida. 

 Alta. PlainMont. Je-S. 



101. E. Wetherillii Eastw. Scape 1-2 dm. high, glabrous; leaf-blades 

 orbicular, obtuse or obliquely truncate at the base, about 1 cm. wide; peduncles 

 reflexed or divaricate, about 5 mm. long; lobes of the involucres 4, obtuse; outer 

 lobes of the perianth obovate, the inner oblong, slightly longer. Sandstone 

 cliffs: N.M. Utah. Son. 



102. E. pusillum T. & G. Scape 1-3 dm. high, glabrous; blades subor- 

 bicular, 1-3 cm. broad, slightly floccose, but green above; peduncles 1-4 cm. 

 long, erect; involucres hemispheric, glandular-puberulent, 3-4 mm. broad; lobes 

 rounded-ovate; perianth yellow, campanulate, 1-1.5 mm. long, glabrous or 

 slightly puberulent; segments elliptic. Hills and washes: Calif. s Utah Ariz. 

 Son. Ap-Au. 



103. E. rotundifolium Benth. Scape 1-3 dm. high, glabrous; leaf-blades 

 orbicular, 1-2 cm. broad; peduncles 4-20 mm. long; perianth white, glabrous; 

 inner lobes narrowly oblong. Dry plains: Tex. Colo. N.M. Mex. L. & 

 U. Son. Ap-O. 



104. E. insigne S. Wats. Scape stout, 3-10 dm. high; leaf-blades reniform, 

 2-4 cm. broad; involucres somewhat angled, 2 mm. long, glabrous; lobes rounded; 

 perianth rose-colored, nearly 2 mm. long. Hills: s Utah Nev. L. Son. Je. 



106. E. turbinatum Small. Scape erect, 2-4 dm. high; leaf-blades sub- 

 orbicular or reniform, 1-4 cm. broad, deeply cordate at the base; involucres 2 

 mm. long; lobes broadly ovate, obtuse, scarious-margined ; perianth pink, 2 mm. 

 long. Mesas: Ariz. s Utah. L. Son. Mr-My. 



